#66B3A5
Closest named color: Greeny Blue (#42B395). oklch(71.3% 0.08 180.9), rgb(102, 179, 165).
Aa
Black text reads best on this color (8.55:1).
About this color
#66B3A5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.080 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.039 away. Black text reads best on it, at 8.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.55:1 |
| White text | 2.45:1 |
Values
| HEX | #66B3A5 |
| RGB | rgb(102, 179, 165) |
| HSL | hsl(169, 34%, 55%) |
| OKLCH | oklch(71.3% 0.08 180.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #66B3A5 | 2.45:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #66B3A5 | 8.55:1 | AAA | Lc 55.9 | Large or bold text, headings |
| #66B3A5 text on white | 2.45:1 | Fails | Lc 48.1 | Large or bold text, headings |
| #66B3A5 text on black | 8.55:1 | AAA | Lc -53.9 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C6DFDA
oklch(88.4% 0.027 182.3)
-
Step 300
300
#9ECCC2
oklch(81% 0.05 180.2)
-
Step 400
400 (this color)
#66B3A5
oklch(71.3% 0.08 180.9)
-
Step 500
500
#2C9D8D
oklch(63% 0.101 181.3)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#044D43
oklch(37.7% 0.067 180.1)
-
Step 950
950
#082D27
oklch(26.9% 0.043 179.9)
#66B3A5 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #ADABA4 | 0.085 |
| Deuteranopia (no green cones) | #A0A1A6 | 0.081 |
| Tritanopia (no blue cones) | #48B5AF | 0.024 |
| Achromatopsia (no color) | #A5A5A5 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B3A5
#66B3A5
oklch(71.3% 0.08 180.9)
- #CD8E9F
#CD8E9F
oklch(71.4% 0.079 1.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #66B3A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.039
- Light Sea Green #20B2AA ΔE 0.043
- Topaz #13BBAF ΔE 0.044
- Muted Teal #90B494 ΔE 0.049
- Tea #65AB7C ΔE 0.056
- Pewter #96A8A1 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.061
- Dull Teal #5F9E8F ΔE 0.062
Use #66B3A5 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.